Self-examination four steps The first is visual examination. If possible, ask the upper body to be completely naked, stand or sit in front of a large mirror, and face the mirror to observe first. Generally speaking, if there is a new significant asymmetry in the appearance of the two sides of the breast, you should pay enough attention to it. Also, don’t forget to look for stains from nipple discharge on the changed clothes. Secondly, palpation, that is, examination by hand, is necessary. Move the hand in a clockwise or counterclockwise direction and check 1 circle. Generally speaking, when multiple small granular nodules with mild tenderness are palpated in both breasts, breast hyperplasia is more likely; when single or multiple round nodules with firm texture, clear border, smooth surface and high mobility are palpated in one breast, breast fibroadenoma is more likely; when single irregular lump with hard texture and poor mobility is palpated in one breast, breast cancer should be alerted. If the lump is hard and poorly mobile, you should be alert to the possibility of breast cancer. Thirdly, the nipple and areola should also be examined. You can gently squeeze the nipple with your finger to see if there is fluid overflowing from the nipple. If there is plasma or bloody fluid overflowing, you should go to the doctor for early diagnosis and treatment. Fourth, do not forget to check both sides of the armpit. Reminder: Of course, self-examination is not a substitute for specialist examination. If you have obvious discomfort, if you find changes in the breast or armpit during self-examination and are not sure why, or if you have various breast diseases, you should visit a doctor and conduct self-examination and relevant specialist examination under the guidance of a doctor.